參數(shù)資料
型號: PCF8578U
廠商: NXP SEMICONDUCTORS
元件分類: 顯示驅(qū)動(dòng)器
英文描述: LCD row/column driver for dot matrix graphic displays
中文描述: LIQUID CRYSTAL DISPLAY DRIVER, UUC
文件頁數(shù): 12/44頁
文件大?。?/td> 323K
代理商: PCF8578U
1998 Sep 08
12
Philips Semiconductors
Product specification
LCD row/column driver for dot matrix
graphic displays
PCF8578
Fig.7 LCD drive mode waveforms for 1 : 8 multiplex rate.
MSA840
VDD
V2
V
V
V
V
LCD
3
4
5
Tframe
ROW 1
R1 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
ROW 2
R2 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
COL 1
C1 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
COL 2
C2 (t)
dot matrix
1:8 multiplex rate
0.261 Vop
0 V
0.261 Vop
Vop
Vop
Vstate 1(t)
Vstate 2(t)
0.261 Vop
0 V
0.261 Vop
0.478 Vop
Vop
0.478 Vop
Vop
state 1 (OFF)
state 2 (ON)
V
state 1
(t) =C1(t)
R1(t):
V
on(rms)
V
op
=
1
8
8
1
8
1
(
)
8
= 0.430
V
state 2
(t) = C2(t)
R2(t):
V
off(rms)
V
op
=
8
1
8
1
(
)
8
= 0.297
2
2(
)
general relationship (n = multiplex rate)
V
on(rms)
V
op
=
1
n
n
1
n
1
(
)
n
V
off(rms)
V
op
=
n 1
n 1
(
)
n
2
2(
)
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